With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
sarCtrlMsgLastUnkownChan
sar Control Message Last Unkown Chan
1.3.6.1.4.1.351.110.2.4.8
The control cell header Rcvd of the last unknown channel.
Back to BASIS-GENERIC-MIB MIB page.
IPHost Network monitor allows you to monitor sarCtrlMsgLastUnkownChan on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.